Apparatus for marine aiming-drill.



RBOH'N.

APPARATUS FOR MARINE A-IMING DRILL.

APPLICATION FILED OCT. 8, 1913.

1,092,425. Pat ented Apr. 7, 191

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F.BOHN. APPARATUS FOR MARINE AIMING DRILL.

\ APPLICATION FILED OUT. 8, 1913. 1 092,425 Patented Apr. 7, 191

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By A; flit F. BOHN.

APPARATUS FOR MARINE AIMING DRILL.

APPLICATION FILED OGT.8,1913.

1,092,425. Patented Apr. 7, 19M

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F. BOHN.

APPARATUS FOR MARINE AIMING DRILL.

APPLICATION FILED OUT. 8, 1913. 1,092,425. Patented Apr. 7, 191

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' TED STATES FRIEDRICH BOHN,

OF KIEL, GERMANY.

APPARATUS FOR. MARINE AIMING-DRILL.

Application filed October 8, 1913.

To all whom it may concern Be it known that I, Fnmmucrr BOI-IN,manufacturer, a subject of the Emperor of Germany, residing at Sackgasse7/9, Kiel, Germany, have invented certain new and useful Improvements inApparatus for Marine Aiming-Drill, of which the following is aspecification.

In marine shooting practice or aiming drill respectively, targets areused, with which the movements of a distant aim relatively to thesight-line of a marine-gun on a rolling ship are imitated by moving thetarget with alternate velocity up and downward or in lateral directions(rolling aim).

The present invention relates to targets of this type, and moreparticularly to an improved arrangement, by which besides the up anddown movements lateral ones, or besides lateral movements verticaldisplacements, as desired, are imparted to the target in a particularlyappropriate way, the invention relating further to the provision of aseparate target to be aimed at and a separate target to be shot, theseseparate targets being hereinafter called aiming-target andshooting-target.

The accompanying drawings show the subject matter of the presentinvention.

Figure 1 is a front view of the improved apparatus; Figs. 2, 3 and 4care respectively a front View, a sectional side view, and a sectionalfragmentary plan view, of the target with the parts attached thereto andwith one guiding-bar; Fig. 5 is a front view of the arrangement of aseparate aiming-target and a separate shooting-target; Fig. 6 shows theemployment of the apparatus in horizontal position, so that theprincipal movements are effected in lateral direct-ions, to whichvertical movements may be added.

1 is a vertical stand or column for a target 2 to be moved. The latteris driven up and down by a motor and driving-gear, which is located inthe casing 3 in a way known in the art and which is coupled with thedouble-threaded worm 4 arranged in the interior of the column, thetarget engaging said worm by a nut 5. According to the invention,guiding-bars 6 and 7 of any appropriate shape are arranged on thecolumn 1. The target 2 is, for imparting thereto besides the up and downmovement a lateral displacement, brought in engagement with one or theother of said guiding-bars and receives then during its longitudinaldisplace- Specification of Letters Patent.

Patented Apr. 7, 1914-.

Serial No. 794,002.

ment at the same time a lateral movement, depending on the shape of theguiding-bar. For this purpose, the target 2 is not directly fixed on thenut 5 but the latter carries a swing-plate 8 from which the target issuspended by two links 9, the latter being pivotally connected at theirupper ends by nuts 10 with the swing-plate and at their lower ends bynuts 11 with the target. The fastening of the swingplate 8 to the nut 5is, besides through the set-screws 12, effected by an outer fly-screw13, which engages with a slot 14 in the target. Said slot is so designedthat the lateral parallel movements of the target, upon swinging of thelinks 9, are not prevented by the stem of the screw 18. On the loweredge of the target, pivotal members 15, 16 are so arranged that they canbe brought into the two positions shown in Fig. 3. Upon the pivotalmembers being in the position shown by full lines in Fig. 3, they do notinfluence the motion of the target. If, however, one of said pivotalmembers is brought into the position shown by dotted lines, it bearsagainst the corresponding guiding-bar 6 or 7 respectively, and, upon thetarget being then moved up and down, said pivotal member 15 or 16respectively follows the oscillations of the corresponding guiding-barand effects thereby a corresponding movement of the target around thefulcra-lO of the links 9.

In the construction shown, provision is made that the target can befirmly connected with the swing-plate 8, so that the target moves up anddown without lateral displacement. This connection is, of course, onlyto be made when the coupling of the target with one of the guiding-barsis disengaged, that is when the pivotal members 15 and 16 are in theirposition of rest. To insure this, the connection between the target andthe swing-plate 8 is produced with the aid of a cotter 17, which servesalso for arresting the pivotal members 15 and 16 in their working plates18, on which the pivotal members 15 and 16 are arranged, brackets 19 areprovided. The pivotal members as well as the brackets carry coincidingholes 20 into which fits the cotter 17 For each apparatus, only onecotter is provided. Upon the pivotal members being swung upward and thecotter 17 being inserted in the holes 20, the pivotal members are fixedin their working position. For the purpose of bringing the position. Forthis purpose, on the base cotter, however, into the position shown inFig. 3, for fixing the target against lateral displacements, thepreviously existing connection between the target and one of theguiding-bars must be disengaged. Damages by a double fixing of thetarget can, therefore, not happen at all.

Sometimes, it may be suflicient to provide the apparatus with one of theguiding-bars only, for instance with the bar 7. This construction of theapparatus is represented in Figs. 5 and 6. The devices for adjusting theguiding contrivance may in this case be simplified, for instance byusing the flyscrew 13 itself, when inserted in the hole 17, for couplingthe swing-plate 8 with the target if the latter shall accomplish arectilinear movement only. For the engagement with the bar 7 to beeffected in the other case, also a guidingroller 21 may be employed(Fig. (3), which can be easily inserted and removed.

If the apparatus is not only used for aiming-drill, but also forshooting with smallarm ammunition, allowance must be made for the factthat the mechanism of the apparatus must not be damaged by thecartridges and that the sightline and gun-axis lie at different parallellevels separated by a larger or smaller distance. This is, according tothe invention, effected in such a way that a separate aiming-target and,separate therefrom, a separate shooting-target is provided. As shown inFig. 5, for instance, on the plate 2 connected with the nut 5 adjustablerods 22 and 23 are provided, of which the former carries an aimingtarget24, for instance the picture of a ship, while the other carries ashooting target 25 upon which small-arm ammunition is shot. By rods 26,27 both targets can also be adjusted in their position of height.

Fig. 6 shows how the apparatus can also be used in horizontal position,so that the principal movement happens in lateral directions. For thispurpose, the column 1 is removed from its supporting socket and mountedin horizontal position on two stands 28 and 29. The plate 2 carries heredirectly the shooting-target 25, whereas laterally therefrom, on arms30, two aiming-targets 24 are arranged, which are preferably adjustablein guides 31.

What I claim, is:

1. In an apparatus for marine aimingdrill, in combination, a target,means to move the latter up and down consisting of a motor-driven wormand a nut to gear with the latter, pivotal links to suspend said targetfrom said nut, guiding-bars coupled with said target, and means toimpart to the target by said coupling beside said up and down movementlateral displacements, substantially as and for the purpose set forth.

2. In an apparatus for marine aimingdrill, in combination, a target,means to move the latter up and down consisting of a motor-driven wormand a nut to gear with the latter, pivotal links to suspend said targetfrom said nut, pivotal members on the target, guiding-bars adapted to beeventually coupled with the target by said pivotal members, and onecotter adapted to arrest said pivotal members in working position and tofix also the target against the nut, substantially as and for thepurpose set forth.

3. In an apparatus for marine, aimingdrill, in combination, an up anddown movable target, means to move the latter also in lateraldirections, a separate aiming-target on one side, and a separateshooting-target on the other side of said target, and means to adjustboth the latter targets in horizontal and vertical directions,substantially as and for the purpose set forth.

4. In an apparatus for marine aimingdrill, in combination, an up anddown movable target, means to move the latter also in lateraldirections, a separate shootingtarget directly connected to the target,and adjustable aiming-targets on both sides of said shooting-target,substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

FRIEDRICH BOI-IN.

Witnesses JULIUS Rornn, KARL FRIEDRICH FRENTZEL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

